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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > Overboost on stock?



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      09-19-2018, 06:44 PM   #1
Guibibi
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Angry Overboost on stock?

Hey guys, I'm looking for some help with my 2011 335i Xdrive with an n55.
My car is overboosting on stock software, the only modification being the upgraded charge pipe as my normal one exploded.

I even flashed my car to the latest DME software that I could find(8684970) on my car to be assured that I wasn't flashed or anything. I also have the Alpina flash if that matters.

Here is a log of a run:https://datazap.me/u/guibibi/overboo...og=0&data=4-19

Any pointers on what I should check to fix this problem?

HPFP was also replaced not long ago if that matters.

Also forgot to add that at the end of the gear, I got these codes:
View post on imgur.com

Last edited by Guibibi; 09-20-2018 at 05:38 PM.
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      09-19-2018, 11:32 PM   #2
Mikaeldarer
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Your wgdc% is sitting right around 30% during the pull so donít think youíre actually overboosting to 21+ PSI. Just guessing, but could you of possibly selected 3.5 map sensor option by mistake when you flashed stock?
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      09-20-2018, 07:55 AM   #3
Guibibi
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Quote:
Originally Posted by Mikaeldarer View Post
Your wgdc% is sitting right around 30% during the pull so donít think youíre actually overboosting to 21+ PSI. Just guessing, but could you of possibly selected 3.5 map sensor option by mistake when you flashed stock?
Thanks for the reply, Im pretty sure I did not chose the 3.5 map sensor option when I flashed it.

I was thinking of cleaning my Map and Maf sensor tonight, will report back if there any change.
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      09-21-2018, 07:46 PM   #4
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I was having similar issues not too long ago. Faulty boost solenoid was my problem.
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      09-24-2018, 08:06 PM   #5
Guibibi
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Quote:
Originally Posted by Firewired1 View Post
I was having similar issues not too long ago. Faulty boost solenoid was my problem.
Thanks for the input, I was thinking that it could be one of the causes. Off to FCPEuro I go.
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      09-25-2018, 02:03 AM   #6
ckanderson
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Quote:
Originally Posted by Guibibi View Post
Quote:
Originally Posted by Firewired1 View Post
I was having similar issues not too long ago. Faulty boost solenoid was my problem.
Thanks for the input, I was thinking that it could be one of the causes. Off to FCPEuro I go.
I would think you would be able to create a test or run a test using diag software before throwing a part at it to see if that helps, no?
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